Electric water-heating syringe.



H. M. CRAWFORD. ELECTRIC WATER HEATING SYETNGE.

APPLICATION FILED DEG. 7, 1911.

Patented May/151, 1912.

Jef/chu ,y UNITED STATESPATENT o FICE.

' Hanny n.. CRAWFORD, or LIHA, 01110.-

.-EILECTBIC WATER-HEATING SYBINGE.`

Speccation of .Letters Patent.

Appiicamm nica-December 7, 1911. 'serial no. 664,399.

Tiallfwhom it may concern:

, Be it' known that It, HARRY M'. Cimwronmf a lcitizen of the United States, residing at L1ma,vin the county .of Ohio,.have invented certain new and useful 4Improvements in Electric Water-Heating Syringes ingfa rwater controlling valve adapted to be o ned by the switch or circuit closer of the e ectric heating apparatus of the syringe si inii'lt'aneously with Vthe closing of the electer supply and the water heated before being tricy tircuit. y

Another object is-to provide a'device of lli-is character which wi l be simple.' strong. lurable and inexpensive in construction. ecient and reliable in operation, which may be'connected directly with the city wa,

.lischarged from the instrument..

With 'these and other objects in view. the

vinvention consistsiof certaiiinovel features -of construction, land the combination and u rmntrement of parts as willbe -inorcfully I@Scrl d and claimed.

In the accom anying drawingsg'Figm-e 1 is a side view o my improved syringe; F ig. 2 is a central longitudinal section thereof; Fig.v 3 is a cross sectional view on the line.l

-3 ofFig. 2; Fig. 4f is a similar view on .he-line of Fig. 2; Fig. 5 is an enlarged central longitudinal section of the outer end of thewater heating chamber of the syringe.: showing more clearly the construction and ari-an ment of the water controlling valve and "t e electric switch which opens the same. t

In'the embodiment of the invention, I

' provide a tubular handle 1 closed at its outer end -and having secured to said end the dischargespout or tube/2 of the syringe, said handleaid spout or tubeA being preferably formed of hard rubber or similarA noii-conducting'material. Engaged with the-handle L and having its end suitably secured therein adjacent to the closed end of the handle is a rubber hose 3 which forms the water heating chamber or compartment of the device. The hose 3 may be of any suitable length Allen and State of,

and has secured in its outer end a nip'ple or hose connection 4 withxwhich is adapted to be engaged the end of a flexible wateisupply 4p1pe or hose which is connected at its oppositc'end with theA faucet of the service pipe. c

Arranged in the hose 3 is a resistance. oi water heating coil 6 which is vpreferably formed of German silverV wireA and has one end connected with a terminal or binding post 't' to which one ofthe current conducting wires 8 of an electric circuit is connected. The .opposite end ot-the coil 6 is connected with a inet-al pluv 9 in the adjacent end of the hose 3 and wlliichv `forms partof the valve casing in which is arranged a atei-controlling valve 10 which comprises' a hall or'spherical body loosely mounted vin a centrally disposed assage 11 in the plug t) and is normally he d in engagement with a valve seat 19. formed' on the inner end of the discharge-spout 2 by a coiled spring 13 arranged in the passage 11 of the plug as shown.' Slidably mounted' in the plug i)- and having a .fluid tight engagement therewith is a valve operating plunger 1t the Patented Mayu; 1912.

sov

lower end of which is beveled or foi-ined atan angle and is adapted to be forced between the valve 10 and its seat 12 whereby the valve is unseated against the tension of spring 13 to permit the water to ow from the hose 3 through the passage 11 and discharge spout 2. The outer end of the stem 14 projects through a packed bearing or gland 15 Yarranged on the plug 9 and through the adjacent side of the handle as shown.

' With the outer end of'thevalve operating.

rod 14 is adapted 'to be engaged` the outer end of a switch 16 in the formt of la'spring metal bai', the inner end of which is-'secured to the outer side of the handle 1 and hasarranged thereon a binding post 1.7 with which is connected the end or terminal of the other conducting wire, 18 of the electrical circuit. 0n the outer end ofthe spring switch bar 16 is arranged a thumb piece or knob 19 formed of rubber or other insulating material. r.By

thus arranging the switch 16 and the valve it will be seen that operating 'plunger 14 when the switch is de ressed the saine will be brought into electrical engagement'with the valve operating plunger 14 thus coinpleting the electric circuit through -said plunger, the plug 9 and the Acoil whereb the resistance occasioned by th'e'latter wi l heat thc Water passing through the hose 3. Upona further depression of the swltch 16 the valve oliierating plunger will be forced downwardly and the Wedge shaped lower end thereof engaged between the valve and itsA l seat whereby the valve maybe opened simultaneously With the closing of the electric circuit. s soon as pressure is removed fromv the switch 16 the spring' action thereof will retract the same While `the pressure ofthe .spring 13 will force the jvalve 10'into close engagement withitsv Seat. This movement ofthe valvealso retracts orpushes the plunger 1.4"outwardly in position to' be again engaged and depressed by the'switch 16.

Secured to the handle 1 over the spring switch bar 16 is Aa hood or casing Q0 of hard andthe electric switch as herein shown and described it will be seen that the flow of the 'Water through the instrument is'controlledsiim'lltaneously with the closing and A'opening 'ofgthe electric circuit, so that there is no danger of the Water being overheated. The instantaneous closing of the electric circuit When the flow ofwater is stopped also provides for a saving of the electric current.

4From the foregoing description taken in connection with the accompanying drawings,

the construction and operationuof the 1nvv'enti'on will be readily, understood without iequiring a more extended explanation.

Various changes inthe form, proportion andthe 'minor details lof construction may be resorted to Without departing from the principle or sacrificing any of the advantages of thel invention as'claimed; Y 4

y Having thus described my invention, what I c laim is: i

l. In a .syringe tubular casing, a hose secured therein, a plug arranged in theinner end of said hose and having adischarge passage, a discharge spout arranged'in one end of the tubular` casing and communicating with the passage.

' f the iclass described, a

in said hose, a valve seat at the inner end` of said spout,`a valvelarranged in the pas'- sage of said plug, a spring to hold said valve in engagement Withsail" seat whereby the flow of the Water through the tube kis but off, an electricheating coil arranged insaid hose and having an electricalconnection at one end With. said plug and at its' opposite end with one Wire of ali-*electric circuit, a valve opening plunger having .a fluid tight slidingengagement Withfthe plugin said hose and in a plane atright angles to the plane of movement of said valve, and a switchvconnected with said casing and with the other current conducting Wire of the electric circuit, said switch beingadapted to bev brought into electrical engagement with thevalve operating plunger whereby the latter isdepressed and the 'valve' opened si-` multaneously With the closing of the electric circuit.

1 2. In a syringe of the class described,` 'a tubular casing, ahose secured therein, plug arranged in the inner end of saidhose and having a vdischarge spout provided with Ia 1 valve seat, 'a valve arranged in the `passage or seat plug; and adaptedv to sit-fon theseat in the spout, 4a spring for holding said Valve closed, a sliding plunger mounted insaid plug in a plane at right angles to Said spout and having a beveled inner end forengaging said Valve When forced inwardly' an electric head coil arranged in said hose and having an electrical connection at one end `with said plug and its opposite end with onewvire' of an electric circuit, a. plate spring secured at one endto thev outer face of said .casing With its freeend eXt-ending'over thesaid plunger and normally spaced therefrom, a hood inclosing said spring and plunger and having an opening therein and an loperating element connected with said spring `and projecting 'through the opening in said hood,

` said spring being connected withfthe upper .current conducting Wire ofthe electric circuit and adapted to be'brought into an electrical engagement with the valve operating plunger to simultaneouslyl open the' :valve and close the circuit. y In testimonyl whereofl have hereunto set my hand in presence of two subscribing witnesses. f

HARRY M. CRAWVFORD;4

' i/Vitnesses: i y `D. H. DONALDSON, lV. N GILLES. 

